Enovate Medical EmTag User Manual

Enovate Medical Assembly Number: A0001707
1. Device Description:
The Enovate Medical A0001707 EmTag device is a small, battery powered RF transceiver
circuit developed by Enovate Medical for the purposes of wireless BLE communications using
the proprietary BLE wireless communication standard. The EmTag provides BLE wireless
communications between itself and another BLE enabled device such as a smartphone, tablet,
BLE Beacon or other BLE-enabled device or network.
2. Component Description:
2.1: BLE SoC: nRF52832
The Nordic Semiconductor nRF52832 is built around a 32-bit ARM Cortex-M4F CPU Core
running at 64 MHz with 512kB of on-chip Flash memory and 64kB of RAM. This allows it to run
the full BLE stack in addition to running the application code. The nRF52832 includes many
microprocessor features including 12-bit A/D converters, UART, SPI and I2C communications
interfaces, timers, analog comparators, a temperature sensor and General Purpose I/O. The
nRF52832 operates from a supply voltage in the 1.7V – 3.6V range. The nRF52832 IC handles all
of the Baseband functions for the BLE transmission including data formatting. Full 2.4 GHz
radio functionality is integrated into the nRF52832 including packet generation with DMA, CRC,
Whitening/Dewhitening, and full transmitter/receiver functionality. It also includes an on-chip
balun, RSSI with 1dB resolution and an internal power amplifier with support for FSK
modulation on the transmit side, and integrated digital demodulation on the receive side. Data
rates of 1 Mbit/s and 2 Mbit/s are supported. The nRF52832 IC generates its own internal
clocks and synthesizes the RF carrier signals from the 32 MHz external crystal.
2.2: 3-Axis Accelerometer: LIS2DE12
The ST Microelectronics LIS2DE12 is a low-power, 3-axis MEMS accelerometer with I2C and SPI
serial interfaces. The I2C interface is used in the EmTag device. The LIS2DE12 has user-
selectable full-scale acceleration measurement ranges of +/- 2g, +/- 4g, +/- 8g and +/-16g. The
chip can also generate user-configurable interrupt signals by detecting inertial wake-up/free-fall
events. The chip operates from a 1.71V to 3.6V voltage supply.
EmTag User Manual